The new mode, teased by Naughty Dog last month, sees you face off against swarms of the Djinn from the main campaign. For those that haven’t beaten the game yet (what have you been doing?) the Djinn are the fiery creatures from the end of the game. We’ll restrict ourselves from elaborating further for fear of spoilers, just know that they are seriously hard to kill.

The mode will be free for Fortune Hunters’ Club members, or cost $5.99 as a standalone download. It’s due out next week.